<!DOCTYPE html>
<html>
  <head>
    <style>
      input {
        -moz-appearance: none;
        margin: 0;
        padding: 10px;
        font-size: 40px;
        height: 100px;
        width: 100px;
        border: 1px solid red;
      }
    </style>
  </head>
  <body onload="document.getElementById('i').focus()">
    <input type="password" id="i">
  </body>
</html>
